Motion blurs are created through a combination of movement and long exposures. Essentially, you are capturing color and light for the duration that your sensor is exposed to light. This gives you three fundamental options: Either you move the light, you move your subjects…or you move your camera.

Utilizing these options (or a combination thereof) you can create some really amazing effects as demonstrated in the video above. For more information on how this works, check out Ben's full post over at DIY Photography.